ExpandoObjectConverter
Converts an ExpandoObject to and from JSON.
using Newtonsoft.Json.Utilities;
using System;
using System.Collections.Generic;
using System.Dynamic;
using System.Globalization;
using System.Runtime.CompilerServices;
namespace Newtonsoft.Json.Converters
{
[System.Runtime.CompilerServices.NullableContext(1)]
[System.Runtime.CompilerServices.Nullable(0)]
public class ExpandoObjectConverter : JsonConverter
{
public override bool CanWrite => false;
public override void WriteJson(JsonWriter writer, [System.Runtime.CompilerServices.Nullable(2)] object value, JsonSerializer serializer)
{
}
[return: System.Runtime.CompilerServices.Nullable(2)]
public override object ReadJson(JsonReader reader, Type objectType, [System.Runtime.CompilerServices.Nullable(2)] object existingValue, JsonSerializer serializer)
{
return ReadValue(reader);
}
[return: System.Runtime.CompilerServices.Nullable(2)]
private object ReadValue(JsonReader reader)
{
if (reader.MoveToContent()) {
switch (reader.TokenType) {
case JsonToken.StartObject:
return ReadObject(reader);
case JsonToken.StartArray:
return ReadList(reader);
default:
if (JsonTokenUtils.IsPrimitiveToken(reader.TokenType))
return reader.Value;
throw JsonSerializationException.Create(reader, "Unexpected token when converting ExpandoObject: {0}".FormatWith(CultureInfo.InvariantCulture, reader.TokenType));
}
}
throw JsonSerializationException.Create(reader, "Unexpected end when reading ExpandoObject.");
}
private object ReadList(JsonReader reader)
{
IList<object> list = new List<object>();
while (reader.Read()) {
switch (reader.TokenType) {
default: {
object item = ReadValue(reader);
list.Add(item);
break;
}
case JsonToken.EndArray:
return list;
case JsonToken.Comment:
break;
}
}
throw JsonSerializationException.Create(reader, "Unexpected end when reading ExpandoObject.");
}
private object ReadObject(JsonReader reader)
{
IDictionary<string, object> dictionary = new ExpandoObject();
while (reader.Read()) {
switch (reader.TokenType) {
case JsonToken.PropertyName: {
string key = reader.Value.ToString();
if (!reader.Read())
throw JsonSerializationException.Create(reader, "Unexpected end when reading ExpandoObject.");
object obj2 = dictionary[key] = ReadValue(reader);
break;
}
case JsonToken.EndObject:
return dictionary;
}
}
throw JsonSerializationException.Create(reader, "Unexpected end when reading ExpandoObject.");
}
public override bool CanConvert(Type objectType)
{
return objectType == typeof(ExpandoObject);
}
}
}